(navigation image)
Home American Libraries | Canadian Libraries | Universal Library | Community Texts | Project Gutenberg | Children's Library | Biodiversity Heritage Library | Additional Collections
Search: Advanced Search
Anonymous User (login or join us)
Upload
See other formats

Full text of "Alaskan glacier studies of the National Geographic Society in the Yakutat Bay, Prince William Sound and lower Copper River regions"

HIDDEN, FOURTH AND SMALLER GLACIERS                  167
fallen from its valley, though on questioning him it was evident that the tradition referred merely to the failing of a glacier from its valley on the west side of Disenchantment Bay, not surely this one each time. The last fall, which he said occurred about sixty years before, he reported to have destroyed 100 natives who at the time were encamped at their summer sealing camp a few miles south of Haenke Island. Fortunately at the time of the 1905 fall the natives had all left the bay.
By the avalanching of this glacier, its valley was completely emptied of ice, with the exception of a small remnant of steeply-perched neVve1 and a few minor ice fragments near the edge of the cirque. The walls and bottom of the cirque were of bare rock, and the avalanche, which spread out fan-shaped at the mountain base, had swept away the soil, and for a width of half a mile had killed the alder growth, which previously grew at the cliff base beneath the glacier. The larger part of the glacier fell into the fiord, probably most of the ice floated 'away, while the loose d6bris sunk to the bottom. Some of the glacier ice remained at the base of the cliff, pushing the coastline outward slightly and forming a new shore line of angular rock-d6bris. That ice existed beneath this was evident from the fresh faulting and slumping of the surface in 1905.
In 1009 we again crossed this area and found that ice still existed beneath the debris that was swept out of the mountain valley in 1905. The cirque valley of Fallen Glacier is beginning to be again filled with snow, and the place of the former glacier is now covered by one of the largest snowfields on this mountain face (PL LXIX). There has not yet been sufficient accummulation of snow to cause the redevelopment of the glacier, but we have here the early stages of formation of a new, small, perched glacier which may perhaps be reaccummulating to once more avalanche out of its valley, when a sufficient amount has gathered here to again render its position unstable.